connectex: Only one usage of each socket address (protocol/network address/port) is normally permitt

處理一個大文本數據，讀取到內存，用多線程併發執行，存入數據庫。經多次調試，在程序運行一段時間後間歇性報錯—— connectex: Only one usage of each socket address (protocol/network address/port) is normally permitt 併發量也從10000逐步減少到80，chan的容量也從10000000減少到300，同時

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